#include <stdio.h>
//#define ADD(x,y) (x+y)
//int main()
//{
//	printf("%d\n", 4 * ADD(2, 3));
//
//	return 0;
//}
#define FORMAT "%s! C is cool!\n"
int main()
{    
	int num = 10;

	printf(FORMAT, FORMAT);
	printf("%d\n",++num);
	printf("%d\n",num++ );
	printf("%d\n",num-- );
	printf("%d\n",num );
	
	return 0;
}